6 / 14
- Operating instructions for KEA 252 PA
– File:
BA_KEA 291
NSTR_EN_Ver
2015-03-20_EN.doc
-
6 / 14
6
Alfred Kuhse GmbH
Telephone: +49 4171-798-0
E-mail: [email protected]
Subject to technical changes
An der Kleinbahn 39,21423 Winsen
Fax: +49 (0) 4171-798-117
http://www.kuhse.de
8.
Operating modes
8.1.
Off operating mode
The O
FF
position is automatically selected (reset function) during the application of battery voltage in
order to prevent the triggering of an unintentional start-up. When switching to O
FF
from another op-
erating mode:
a genset operation is immediately ended,
previously displayed error messages, except the fault messages 9 and 10, are cleared as long as
their alarm contact is still active,
the automatic system is unlocked. However, if the Quick Stop (Emergency Stop) input is still ac-
tive, unlocking is not possible; the automatic system locked message remains.
8.2.
Manual operating mode
Using the M
AINS
O
FF
(
O
) key, the mains can also be switched off when the genset is at a standstill,
the M
AINS
O
N
(
I
) key is used to switch it on again when the mains voltage is fault-free again. The
START CONTROL
indication flashes as long as there is no start release and the
SWITCH ON AUXILIARY
DRIVES
signal is present. If no auxiliary drives are required (for start release), terminal 8 from X2,
START RELEASE
should be switched with L-. The motor can be started using the S
TART
key.
If the generator voltage is within the limits values with its voltage and frequency, the generator can
be switched on. The switching between mains and generator operation and back is carried out with
the parameterised switching breaks if the G
EN
-O
N
or M
AINS
O
N
key is used.
It is also possible to first switch off the mains or the generator with the respective O
FF
key and then
switch on the generator or the mains with the respective O
N
key. Thus, it is possible to disconnect
the busbar from the power supply. The actuation of the O
N
keys remains ineffective if the voltage of
the selected system (mains or generator) does not lie within the specified limits.
All switching processes are only carried out manually and not automatically. Even a remote start
command does not lead to automatic switch-on of the generator. Also, the mains is not automatical-
ly switched on if an error message occurs during generator operation (e.g. G
ENERATOR
O
VERCURRENT
), which switches off the generator.
In order to switch off the genset, the O
FF
or (if the remote start command is missing and fault-free
mains power) A
UTOMATIC
operating mode must be selected.
8.3.
Auto operating mode
If the mains supply is operating without faults, the mains power is switched on and the genset re-
mains in standby mode. If the entered limit values (according to the parameterisation) are no longer
complied with for the voltage or frequency, the mains failure is recognised with a delay. After this
parameterised delay time has elapsed, the green LED below the mains symbol is extinguish ed and
the genset is started. The
START CONTROL
indication flashes as long as there is no start release and
the
SWITCH ON AUXILIARY DRIVES
signal is present. If no auxiliary drives are required (for start re-
lease), terminal 8 from X2,
START RELEASE
should be switched with L-.
The automatic system can be parameterised such that a start always occurs in the event of a mains
failure or such that a start only occurs if there is a simultaneous external remote start command.
This function enables an additional start interlock.
The
FAILED START
/
MOTOR ERROR
message is issued and the automatic system is inhibited if the gen-
set has not started at the end of the start program.
After the start-up of the genset, the mains is switched off and the generator is switched on as soon
as the nominal generator voltage and frequency are reached after a switching break (ca. 2 sec., pa-
rameterisable). If the mains is defective, with respective parameterisation the switching -off can also
be carried out prior to the start in order to protect the consumer.
After normalisation of the mains voltage, a delay time (switch-back delay) is allowed to elapse be-
fore the generator is switched off and the mains is switched on again after a switching break. In or-
der to prevent heat build-up, if it was loaded the genset continues to run without load for the run-on
time set and then is shut down.
In the event of a failed start, the control process runs as with a mains failure. The return switching is
likewise implemented as with the return of the mains.
